This Spanish Difficult Review quiz will take a look at the comparative adverbs. In your English classes and in the Spanish Easy Review and Spanish Medium Review quiz series you learned that adverbs modify verbs, nouns, adjectives and even other adverbs. Adverbs let you know when something happened, how it happened, where it happened or why it happened. You also learned that many adverbs in English end with the letters 'ly' while in Spanish they end with the letters 'mente'. For example, look at the sentence: He ran happily. In Spanish this would read as: Él corrió alegremente. This type of adverb is known as an adverb of manner. But there are other adverbs and they are known as comparative adverbs.